files/en-us/web/javascript/reference/global_objects/math/sqrt2/index.md

---
title: Math.SQRT2
short-title: SQRT2
slug: Web/JavaScript/Reference/Global_Objects/Math/SQRT2
page-type: javascript-static-data-property
browser-compat: javascript.builtins.Math.SQRT2
sidebar: jsref
---

The **`Math.SQRT2`** static data property represents the square root of 2, approximately 1.414.

{{InteractiveExample("JavaScript Demo: Math.SQRT2", "shorter")}}

```js interactive-example
function getRoot2() {
  return Math.SQRT2;
}

console.log(getRoot2());
// Expected output: 1.4142135623730951
```

## Value

<!-- prettier-ignore-start -->
<math display="block">
  <semantics><mrow><mi>𝙼𝚊𝚝𝚑.𝚂𝚀𝚁𝚃𝟸</mi><mo>=</mo><msqrt><mn>2</mn></msqrt><mo>≈</mo><mn>1.414</mn></mrow><annotation encoding="TeX">\mathtt{Math.SQRT2} = \sqrt{2} \approx 1.414</annotation></semantics>
</math>
<!-- prettier-ignore-end -->

{{js_property_attributes(0, 0, 0)}}

## Description

`Math.SQRT2` is a constant and a more performant equivalent to [`Math.sqrt(2)`](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sqrt).

Because `SQRT2` is a static property of `Math`, you always use it as `Math.SQRT2`, rather than as a property of a `Math` object you created (`Math` is not a constructor).

## Examples

### Using Math.SQRT2

The following function returns the square root of 2:

```js
function getRoot2() {
  return Math.SQRT2;
}

getRoot2(); // 1.4142135623730951
```

## Specifications

{{Specifications}}

## Browser compatibility

{{Compat}}

## See also

- {{jsxref("Math.pow()")}}
- {{jsxref("Math.sqrt()")}}